Once you set your title up, it should take up to 24hrs for it to appear on The Great British Book Shop.
If the publication date in the future, it will appear on The Great British Book Shop as a Pre-Order.
For all other retailers, our system would send out the feed once the publication date is met and in some instances it can take up to 6 weeks for it show on these stes. However, it is usually quicker than this and can see them populated in 2 weeks.